CVE-2026-105987
MediumCVSS 5.1Exploitation Probability (EPSS)
Low risk15th percentile - higher than 15% of all known CVEs
Summary
KGS Software tia Viewer is vulnerable to Stored XSS via the annotation API. Due to the lack of input validation, an authenticated attacker can inject arbitrary JavaScript payload into a stickynote annotation. When any user opens the document, the viewer renders the annotation and the browser executes the payload, potentially compromising the user's session. This issue has been fixed in version 1.2.8.
Risk Assessment
An attacker can execute arbitrary JavaScript in the victim's browser, hijacking their session and accessing sensitive data. This can lead to credential theft or further attacks within the application context.
Recommendation
Update KGS Software tia Viewer to version 1.2.8 or later. Implement additional input validation and consider enabling security headers (CSP).
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Original NVD description (English source)
KGS Software tia Viewer is vulnerable to Stored XSS via the annotation API. Due to the lack of input validation, an authenticated attacker can inject arbitrary JavaScript payload into a stickynote annotation. When any user opens the document, the viewer renders the annotation and the browser executes the payload. This may lead to compromising the user's session. This issue has been fixed in version 1.2.8.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

